b-u bbb bbo bbr bbs bbt bbu bob boo bor bos bot bou brb bro brr brs brt bru bsb bso bsr bss bst bsu btb bto btr bts btt btu bub buo bur bus but buu ob- obb obo obr obs obt obu oo- oob ooo oor oos oot or- orb oro orr ors ort oru os- osb oso osr oss ost osu ot- otb oto otr ots ott otu ou- ouo our ous out rbb rbo rbr rbs rbt rbu rob roo ror ros rot rou rrb rrr rrs rrt rru rsb rso rsr rss rst rsu rtb rto rtr rts rtt rtu rub ruo rur rus rut ruu sbb sbo sbr sbs sbt sbu sob soo sor sos sot sou sr- srb sro srr srs srt ss- ssb sso ssr sss sst ssu stb sto str sts stt stu sub suo sur sus sut suu tbb tbo tbr tbs tbt tbu to- tob too tor tos tot tou trb tro trr trs trt tru tsb tso tsr tss tst tsu ttb tto ttr tts ttt ttu tub tuo tur tus tut tuu ubb ubo ubr ubs ubt ubu uob uoo uor uos uot ur- urb uro urr urs urt uru usb uso usr uss ust usu utb uto utr uts utt utu uur uus uut uuu

-ous bbbb bbbs bobb bobo bobs bobu boob boor boos boot bor- boro borr bors bort boru boso boss bost bosu botb boto bots bott bour bous bout brob broo bror bros brot brou brrr brrs brsb brsr brst brus brut bsos bsts btob btor btrt btss bttb btus bubb bubo bubs bubu bur- burb buro burr burs burt buru buss bust busu but- buto buts butt buus obbo obor obos obot obro obsr obss obst obts obus oooo ooos oort oost ootb oots oous orbb orbo orbs orbu oro- oror oros orot orro orrs orso orsu orto orts orub orus osoo osor osos osro ossb osso ossu ostr osts otbs oto- otoo otor otos otro otrs otso otsu otto otts ottu otur otus oubs our- ouro ours ourt oust out- outb outo outs ouu- rbbb rbbr rbbs rbss rbst rob- robb robo robs robt robu roob roor roos root roro rort roru roso ross rost roto rotr rots rott roub rous rout rrrr rsos rsts rstu rtss rtts rubb rubs rubu ruro rurs ruru ruso russ rust rusu ruto ruts rutt rutu s-os sbbs sbor sbot sbst sbus sobo sobr sobs sobt sobu soor soos soot sorb soro sorr sors sort soru soso soss sost soto sots sotu sour sous sout sros srtr srub ssbr ssot ssrs sssb ssss sstb ssts stbs stob stoo stor stos stot stou stro strs stru stss sttr stub stur stus stut sub- subb subo subs suor suos sur- suro surr surs surt suru sus- suso suss sust susu suto sutu suus tbbs tbrb tbst tobo tobs tobt tobu toor toos toot toro torr tors tort toru tosb toso toss tost tosu toto totr tots tott tour tous tout troo tros trot trou trst trtr trub trus trut truu tsob tsos tsou tssr tsst tsts ttbb ttss tttt tubb tubo tubr tubs tubu tuor tuos turb turo turr turs turt turu tuss tust tuto tuts tutt tutu tuuo ubbo ubos uor- urbs uro- uroo urso urss ursu urts urur urus urut usbr usbs usos ussb ussr usss usst ussu ustb usto usts usus utor utto uttu uuuu

bbuss bo-bo bobos bobr bobst bobts boobs boors boort booru boost boots borbo boro- boroo boros borot borou borro borst borsu borts borus borut bosor bosso bosut botos botou botro botts bottu botus bours boust bouto bouts brobo brobs broos bross broto brous brout brrrr bruss brust bsous btr-t btstu burbs buroo buros burro burrs burru burst burts burtt burus burut busot busso bussu busto busts busur busut busuu buto- butor butot butou butts butuo butut o-r-b oboro obout obtus ooooo ootus orbot orbus orobo oroso orost orosu orout ortoo oruro orust orutu ososo ossos ossur ostro osusu otoso ototo otour otros ottos ottur oubut ouoro ousts outro outto outts ro-ro robbo robbs robo- robor robot robrt robur roost roots rorbu rorts rosso rosss rosto rosts rosu roto- rotor rotos rotot rotto roubt roust routs routt rsust rubor rubus rusor rusot russo rusts rustu ruutu s-bot s-bus s-o-r so-so sobor soort sooru soots sorbo sorbs sorbt soror soros sorso sorsu sorts sortu sorus soss- sosto sosus sotoo sotos sotsu sotto sotts sours sous- souto sroot sssrb sssss stobs stoob stoor stoos stoot storb storo storr stors stort stoss stots stott stour stout stros strot strrs strub strut stubo stubs sturb sturt stuss subbu subos subss subst surbo surot surtr surur surus susso susto susus sutor sutot sutro sutto suttu tbtbt tbutt tobor tobot tobou toobs toost toots torob toros torro torrs torso torst torto torts tortu torus tosos toss- tosto toto- totoo totos totus touro tours toust touts tross trost trots trott trous trout trubs trubu truro truso truss trust truus tsoro tsort tsubo tsuro tsuru tsuur ttttt ttusb tubbs tubo- tubou tuotu turbo turbt turot turro turss turst tursu turtu turut tusor tutor tutto tutus tuuru ubobo urbos uroob uros urost urour urous ursus urubu urutu usour ustoo ustou ustur usutu utro- utror uttur uturu ututo uuuuu

bbbbbb bobbos booboo boorts boorus boosts borbor bororo bososo bossou bossut botoro botrus boubou bourou bousso boussu boutob broots brosso brotto brotus broust brubru brusor brutto brutus bs-tbs bububu burbot burbur burotu burros bursts bursut burutu bustos butbro buttos buttto bututs buutuo obsorb obturb oooooo orbost orbust orobus orrour ossott ossous ostour otsubo ottoor ououso ousrou outour outros outtro roboto robots robous robust roosts rostr- rotors rotour rotout rotrou rousts routot rubbot rubout rubro- rubutu rurutu russo- russus rutour sobos soorts soosoo sorbus sorors sorous sorrus sorsor sostro sourou sousou ssorts stobbs storrs stotts stourb stours stouts stroot stross strost strout strust struts strutt stubbs sturts subout suburb suroso surtur susort susurr sutoro suttoo suttor toboot toboso tootoo tororo torous